JP5693901B2 - Display device, display method, and program - Google Patents

Description

  The present invention relates to a display device that displays a document image corresponding to document data.

  2. Description of the Related Art Conventionally, a technique for performing a scaling process (enlargement process or reduction process) of a character size to be displayed in response to an instruction from a user in a display device that displays an image according to document data such as electronic book information is known. Yes.

  For example, in the electronic book browsing software disclosed in Non-Patent Document 1, an image corresponding to document data is displayed using a display device equipped with a multi-touch screen that can recognize a plurality of user's fingers touching the display screen. In addition, the user performs a pinch-in operation (an operation to place two fingers on the screen to reduce the interval) or a pinch-out operation (an operation to place two fingers on the screen to widen the gap between the fingers). The displayed image is scaled and displayed at a scaling factor (reduction ratio or enlargement ratio) corresponding to the operation amount. Also, in this browsing software, when the user performs an operation for confirming the scaling ratio while the scaled image is displayed, the document data is re-laid out and displayed at a character size corresponding to the scaling ratio at that time. It is like that.

“Stanza”, [online], Lecycle, Inc. [searched on September 13, 2010], Internet <URL: http: // www. lexcycle. com />

  However, in the above browsing software technology, it is difficult for the user to recognize the position of the document re-layed after the confirmation operation corresponding to the position of the document displayed before the confirmation operation of the scaling factor, and the user reads it before the confirmation operation. There is a problem that it is easy to lose sight of the position of the document.

  In other words, in the technique of Non-Patent Document 1, when a re-layout of document data is performed by performing a scaling operation, a page unit (once on the display screen) from the beginning of a chapter including a sentence displayed before the confirming operation is performed. The data is displayed again in units of one page). For this reason, it is difficult for the user to recognize at which position on the display screen the character string displayed at a predetermined position (for example, the top or the center) on the display screen before the confirmation operation is displayed after the re-layout. In addition, the character string read by the user before the confirmation operation may not be included in the display screen after the confirmation operation.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to display a document data by re-laying out the document data by changing the character size in a display device that displays an image according to the document data. Even so, an object of the present invention is to provide a display device that allows the user to easily recognize the display position after re-layout of the character string that the user referred to before re-layout.

  In order to solve the above-described problem, a first display device of the present invention is a display device that displays an image corresponding to document data on a display screen. The first display device displays the document data according to preset display conditions. A layout generation unit for generating layout information indicating a layout for displaying a corresponding image on the display screen, and display image data for displaying an image according to the document data on the display screen based on the layout information A display image generation unit that generates the image, and an operation input unit that receives a scaling operation from the user for scaling and displaying the character size of each character in the image corresponding to the document data displayed on the display screen And the character size of the image corresponding to the document data displayed on the display screen before the scaling operation is input, and designated by the scaling operation. A character size calculation unit that calculates a character size after scaling based on the magnification, and the layout generation unit after scaling is calculated by the character size calculation unit when the scaling operation is performed. The display information generation unit regenerates the layout information in accordance with the character size of the display screen, and the display image generation unit performs predetermined processing on the display screen before the scaling operation is performed among the rows of the layout information regenerated by the layout generation unit. The display image data is regenerated based on the regenerated layout information so that a line including the character string displayed at the position is displayed at a preset position on the display screen. Yes.

  The first display method of the present invention is a display method for displaying an image corresponding to document data on a display screen, and the image corresponding to the document data is displayed on the display screen according to a preset display condition. A layout generation step for generating layout information indicating a layout for display on the screen, and a display image generation step for generating display image data for displaying an image corresponding to the document data on the display screen based on the layout information An operation input step for accepting a scaling operation from the user for scaling and displaying the character size of each character in the image corresponding to the document data displayed on the display screen, and the scaling operation Based on the character size of the image corresponding to the document data displayed on the display screen before input and the scaling factor specified by the scaling operation A character size calculation step for calculating the character size after scaling, and when the scaling operation is performed, the layout information is regenerated according to the character size after scaling calculated in the character size calculation step. A line including a character string displayed at a predetermined position on the display screen before the scaling operation is performed among the lines of the layout regeneration process and the layout information regenerated in the layout regeneration process is displayed on the display screen. And a display image regenerating step of regenerating the display image data based on the regenerated layout information so as to be displayed at a preset position on the screen.

  According to the display device and the display method, layout information indicating a layout for displaying an image corresponding to the document data on the display screen according to a preset display condition is generated, and the layout information is based on the layout information. Display image data for displaying an image corresponding to the document data on the display screen is generated. When a scaling operation is received from the user for scaling and displaying the character size of each character in the image corresponding to the document data displayed on the display screen, the scaling operation is input. The character size after scaling is calculated based on the character size of the image corresponding to the document data previously displayed on the display screen and the scaling factor specified by the scaling operation. Then, the layout information is regenerated according to the character size after scaling, and the characters displayed at the predetermined position on the display screen before the scaling operation is performed among the lines of the regenerated layout information. The display image data is regenerated based on the regenerated layout information so that a row including a column is displayed at a preset position on the display screen. As a result, when displaying the laid out image regenerated according to the scaling operation, the character string displayed at the predetermined position before the scaling operation is displayed can be displayed at the preset position. it can. Therefore, the user can easily recognize the display position after re-layout of the character string referred to by the user before the re-layout.

  In addition, the display image generation unit includes a character string that is displayed at the top position of the document on the display screen before the scaling operation is performed among the lines of the layout information regenerated by the layout generation unit. The display image data may be regenerated so that the line is displayed in the first line or the center line of the lines displayed on the display screen.

  According to the above configuration, the first character string of the document displayed before the scaling operation is displayed on the first line or the center line of the document displayed after the scaling operation. It is possible to easily recognize the correspondence between the display position and the display position after scaling.

  The scaling operation includes a scaling factor adjustment operation for adjusting a scaling factor and a scaling factor determination operation for specifying a scaling factor, and the display image generation unit is displayed on the display screen. Generate preview image data for displaying on the display screen a preview image obtained by scaling an image according to document data according to the scaling factor adjustment operation. The character size calculation unit performs the scaling factor determination operation. Based on the character size of the image corresponding to the document data displayed on the display screen before the scaling factor adjustment operation was started and the scaling factor specified by the scaling factor determination operation. The character size after scaling may be calculated.

  According to the above configuration, the user can specify the scaling factor with reference to the preview image displayed in accordance with the scaling factor adjustment operation.

  Further, the display image generation unit displays the character string displayed at a predetermined position on the display screen before the scaling factor adjustment operation is performed at a preset position in the preview image. It is good also as a structure which produces | generates data. For example, the display image generation unit displays the character string displayed at the head position of the document displayed on the display screen before the scaling factor adjustment operation is performed, The preview image data may be generated so as to be displayed at the center of the preview image.

  According to the above configuration, since the character string displayed at the predetermined position on the display screen that was displayed before the magnification adjustment operation is displayed at the preset position in the preview image, the user can perform the magnification adjustment operation. It is possible to easily recognize the correspondence between the display position of the previous document and the display position of the document in the preview image displayed during the magnification adjustment operation.

  Further, the display image generation unit displays a character string displayed at a position corresponding to an instruction input from a user among documents displayed on the display screen before the scaling factor adjustment operation is performed. The preview image data may be generated so as to be displayed at the top position of the document or at the center of the preview image. For example, the operation input unit may be a pinch-in operation that reduces the distance between the two fingers while the user touches the display screen with two fingers, or the user touches the display screen with two fingers. The zoom ratio adjustment operation is accepted by detecting a pinch-out operation that increases the interval between two fingers, and the display image generation unit displays the display screen before the zoom ratio adjustment operation is performed. Among the displayed documents, the preview is so displayed that the character string displayed at the position between the two fingers touching the display screen is displayed at the start position of the document in the preview image or at the center of the preview image. It may be configured to generate image data.

  According to the above configuration, the character string displayed at the position corresponding to the instruction input from the user on the display screen displayed before the magnification adjustment operation is the top position of the document in the preview image or the center of the preview image. Therefore, the user can easily recognize the correspondence between the display position of the document before the magnification adjustment operation and the display position of the document in the preview image displayed during the magnification adjustment operation.

  In addition, the display image generation unit may include a character string displayed at the start position of the document in the preview image or a character displayed in the center of the preview image in the layout information regenerated by the layout generation unit. The display image data may be regenerated so that a row including a column is displayed in the first row or the center row of the rows displayed on the display screen.

  According to the above configuration, the line including the character string displayed at the top position of the document or the center of the preview image in the preview image is displayed on the top line or the center line of the document displayed after the scaling operation. The user can easily recognize the correspondence between the display position of the document in the preview image and the display position after scaling.

  A second display device of the present invention is a display device that displays an image according to document data on a display screen, and displays an image according to the document data on the display screen according to a preset display condition. A layout generation unit that generates layout information indicating a layout at the time of performing, a display image generation unit that generates display image data for displaying an image according to the document data on the display screen based on the layout information, An operation input unit that receives a scaling operation from a user for scaling and displaying the character size of each character in the image corresponding to the document data displayed on the display screen, and the scaling operation is A scaling factor adjustment operation for adjusting a scaling factor and a scaling factor determination operation for specifying a scaling factor, and the display image generation unit is displayed on the display screen. Preview image data for displaying on the display screen a preview image obtained by scaling an image corresponding to document data according to the scaling factor adjustment operation is displayed on the display screen before the scaling factor adjustment operation is performed. The character string displayed at the position is generated so as to be displayed at a preset position in the preview image.

  The second display device of the present invention is a display method for displaying an image corresponding to document data on a display screen, and the image corresponding to the document data is displayed on the display screen according to a preset display condition. A layout generation step for generating layout information indicating a layout for display on the screen, and a display image generation step for generating display image data for displaying an image corresponding to the document data on the display screen based on the layout information And a scaling factor adjustment operation by a user for adjusting a scaling factor when the character size of each character in the image corresponding to the document data displayed on the display screen is scaled and displayed, and a scaling factor An operation input step for accepting a scaling factor determination operation by a user for determination, and displaying an image corresponding to the document data displayed on the display screen. A preview image generation step of generating preview image data for displaying on the display screen a preview image that has been scaled according to the scaling factor adjustment operation. In the preview image generation step, the scaling factor adjustment operation is performed. The preview image is generated so that a character string displayed at a predetermined position on the display screen before being displayed is displayed at a preset position in the preview image.

  According to the display device and the display method described above, the user can specify the scaling factor by referring to the preview image displayed according to the scaling factor adjustment operation. In addition, since the character string displayed at the predetermined position on the display screen displayed before the magnification adjustment operation is displayed at a preset position in the preview image, the user can display the document before the magnification adjustment operation. It is possible to easily recognize the correspondence between the position and the display position of the document in the preview image displayed during the magnification adjustment operation.

  Further, the display image generation unit displays a character string displayed at a position corresponding to an instruction input from a user among documents displayed on the display screen before the scaling factor adjustment operation is performed. The preview image data may be generated so as to be displayed at the top position of the document or at the center of the preview image.

  According to the above configuration, the user can easily recognize the correspondence between the display position of the document before the magnification adjustment operation and the display position of the document in the preview image displayed during the magnification adjustment operation.

  Further, the display image generation unit displays a character string displayed at a position corresponding to an instruction input from a user among documents displayed on the display screen before the scaling factor adjustment operation is performed. The preview image data may be generated so as to be displayed at the top position of the document or at the center of the preview image. For example, the operation input unit may be a pinch-in operation that reduces the distance between the two fingers while the user touches the display screen with two fingers, or the user touches the display screen with two fingers. The zoom ratio adjustment operation is accepted by detecting a pinch-out operation that increases the interval between two fingers, and the display image generation unit displays the display screen before the zoom ratio adjustment operation is performed. Among the displayed documents, the preview is so displayed that the character string displayed at the position between the two fingers touching the display screen is displayed at the start position of the document in the preview image or at the center of the preview image. It may be configured to generate image data.

  According to the above configuration, the character string displayed at the position corresponding to the instruction input from the user on the display screen displayed before the magnification adjustment operation is the top position of the document in the preview image or the center of the preview image. Therefore, the user can easily recognize the correspondence between the display position of the document before the magnification adjustment operation and the display position of the document in the preview image displayed during the magnification adjustment operation.

  Note that the above-described units included in each of the display devices described above may be realized by a computer. In that case, a program that causes a computer to operate as the above-described units and a computer-readable recording medium that records the program are also included in the present invention. Included in the category.

  As described above, the display device of the present invention includes a layout generation unit that generates layout information indicating a layout when an image corresponding to the document data is displayed on the display screen in accordance with preset display conditions; A display image generation unit that generates display image data for displaying an image corresponding to the document data on the display screen based on the layout information; and an image corresponding to the document data displayed on the display screen. An operation input unit that accepts a scaling operation from the user for scaling and displaying the character size of each character, and according to the document data displayed on the display screen before the scaling operation is input A character size calculation unit that calculates a character size after scaling based on the character size of the image and the scaling factor specified by the scaling operation. The out generation unit regenerates the layout information according to the character size after the scaling calculated by the character size calculation unit when the scaling operation is performed, and the display image generation unit A line including a character string displayed at a predetermined position on the display screen before the scaling operation in the layout information regenerated by the generation unit is displayed at a preset position on the display screen. Then, the display image data is regenerated based on the regenerated layout information.

  Therefore, when displaying the laid out image regenerated according to the scaling operation, the character string displayed at the predetermined position before the scaling operation is displayed can be displayed at the preset position. it can. Therefore, the user can easily recognize the display position after re-layout of the character string referred to by the user before the re-layout.

It is explanatory drawing which shows the example of the display image at the time of scaling operation in the display apparatus shown in FIG. It is a block diagram which shows the structure of the display apparatus concerning one Embodiment of this invention. 3 is a flowchart showing a flow of processing when a scaling operation is performed in the display device shown in FIG. 2. It is explanatory drawing which shows the example of the display image at the time of scaling operation in the display apparatus shown in FIG. It is explanatory drawing which shows the example of the display image at the time of scaling operation in the display apparatus shown in FIG. It is explanatory drawing which shows the example of the display image at the time of scaling operation in the display apparatus shown in FIG. It is explanatory drawing which shows the example of the display image at the time of scaling operation in the display apparatus shown in FIG. It is explanatory drawing which shows the example of the display image at the time of scaling operation in the display apparatus shown in FIG.

  An embodiment of the present invention will be described. FIG. 2 is a block diagram showing a configuration of the display device 1 according to the present embodiment. As shown in FIG. 1, the display device 1 includes a document information storage unit 11, an operation input unit 12, a display processing unit 13, and a display unit 14.

  The document information storage unit 11 stores document data such as electronic book data and electronic dictionary data. Note that the document data described above may be composed only of character objects, or may be a mixture of character objects and image objects. The document data to be stored in the document information storage unit 11 may be, for example, data received or downloaded from another device communicably connected, and various recording media removably connected to the display device 1. It may be read from. As the document information storage unit 11, various conventionally known storage means such as a read only memory (ROM), a random access memory (RAM), and a hard disk drive (HDD) can be used.

  The operation input unit 12 receives an instruction input from the user and transmits it to the display processing unit 13. The configuration of the operation input unit 12 is not particularly limited. For example, various operation buttons, a keyboard, a mouse, a keypad, a touch screen, or a combination thereof can be used. In the present embodiment, the display unit 14 includes a display screen having a multi-touch screen function, and the operation input unit 12 receives a user instruction input by detecting a position touched by the user on the display screen. Will be described.

  The display processing unit 13 generates display image data to be displayed on the display unit 14 based on the document data stored in the document information storage unit 11, and includes a display control unit 15, a layout storage unit 16, and A variable magnification storage unit 17 is provided. The display processing unit 13 includes a document information reading unit 18, a layout generation unit 19, a display image generation unit 20, a scaling factor calculation unit 21, a character size calculation unit 22, and a main control unit 23.

  The document information reading unit 18 reads document data to be displayed on the display unit 14 from the document information storage unit 11 and outputs the document data to the layout generation unit 19. For example, a list of document data stored in the document information storage unit 11 is displayed on the display unit 14, the user selects desired document data from the displayed list, and the document data selected by the user is used as document information. The reading unit 18 may read the data.

  The layout generation unit 19 generates layout information indicating a layout when the document data read by the document information reading unit 18 is displayed on the display unit 14, and stores the document data and the layout information in the layout storage unit 16. When the display of the document data is started, the layout information is based on the character size (character display size) set in advance, the size of the display screen of the display unit 14, the number of columns when the column display is performed, and the like. Generate. In addition, when the user performs a scaling operation, the layout is based on the character size corresponding to the scaling factor instructed by the user, the size of the display screen of the display unit 14, the number of columns when the column display is performed, and the like. Regenerate information.

  The layout storage unit 16 stores the layout information generated by the layout generation unit 19 and the document data read by the document information reading unit 18. The layout information includes the size of each line when document data is displayed, the display position of each line, information for specifying the object included in each line, and the like. As the layout storage unit 16, various conventionally known storage means such as a random access memory (RAM) and a hard disk drive (HDD) can be used.

  The display image generation unit 20 generates a display image (display image data) to be displayed on the display unit 14 based on the layout information and document data stored in the layout storage unit 16 and outputs the display image to the display unit 14.

  In addition, when a magnification operation (magnification adjustment operation and magnification determination operation) is performed on the operation input unit 12, after the magnification adjustment operation is started, until the magnification determination operation is performed, the display unit 14 generates image data (preview image data) of an image (preview image) obtained by scaling the image displayed at 14 with a scaling factor corresponding to the scaling factor adjustment operation, and outputs the data to the display unit 14 for display. When displaying a preview image, the display image generation unit 20 displays a predetermined position (for example, the top of the document on the display screen, the center of the display screen, the image displayed before the scaling operation is started). A zoomed image is displayed with reference to a position between two fingers performing a pinch-in / pinch-out operation or a position designated by the user. Details of the preview image generation method will be described later.

  The scaling factor calculator 21 calculates a scaling factor corresponding to a scaling operation from the user to the operation input unit 12 and stores the calculated scaling factor in the scaling factor storage unit 17. Specifically, in this embodiment, a scaling operation including a scaling factor adjustment operation in which the user adjusts the scaling factor while referring to the preview image, and a scaling factor determination operation in which the user determines a scaling factor to be applied to the re-layout. Is supposed to do. In addition, a pinch-in operation (reduction operation; an operation of placing two fingers on the screen to reduce the interval between them) or a pinch-out operation (enlargement operation. Placing two fingers on the screen and moving the finger Magnification adjustment operation is performed by performing an operation of widening between fingers. In addition, after performing a pinch-in operation or a pinch-out operation, a scaling factor determination operation is performed by releasing two fingers from the display screen, and the scaling factor is set according to the operation amount of the pinch-in operation or the pinch-out operation up to that point. The decision to apply to re-layout is to be made. Note that the scaling operation method is not limited to this. For example, the scaling operation may be performed by operating the mouse wheel, or the scroll bar displayed on the display screen may be operated. Of course, the user may directly input the numerical value of the scaling factor.

  The scaling factor storage unit (magnification scaling factor buffer unit) 17 stores the scaling factor calculated by the scaling factor calculation unit 21 and outputs the stored scaling factor to the display image generation unit 20. In the present embodiment, the scaling factor calculation unit 21 continuously calculates the scaling factor according to the operation amount of the pinch-in operation or the pinch-out operation while the pinch-in operation or the pinch-out operation is performed. The scaling factor stored in the scaling factor storage unit 17 is sequentially updated. When a scaling factor determination operation is performed, the scaling factor storage unit 17 outputs the scaling factor stored at that time to the character size calculation unit 22 and the layout generation unit 19. As the layout storage unit 16, various conventionally known storage means such as a random access memory (RAM) and a hard disk drive (HDD) can be used.

  The character size calculation unit 22 performs a scaling factor stored in the scaling factor storage unit 17 at that time, a pinch-in operation or a pinch-in operation when a scaling factor determination operation is performed after a pinch-in operation or a pinch-out operation is started. The character size after re-layout is calculated based on the character size displayed before the pinch-out operation is started, and is output to the layout generation unit 19. That is, the character size after scaling is calculated when the character size displayed before the start of the pinch-in operation or pinch-out operation is scaled according to the scaling instruction from the user. .

  When the character size after scaling is input from the character size calculation unit 22, the layout generation unit 19 regenerates the layout information of the document data being displayed according to the character size and stores it in the layout storage unit 16. . Note that the layout generation unit 19 determines a predetermined data delimiter position (for example, the beginning of a block or the beginning of a chapter) before the first character string displayed on the display screen before the pinch-in operation or the pinch-out operation is started. Or, the layout information of the document data after the previous line feed specified position) is regenerated. As a result, the image displayed on the display unit 14 is updated to a re-layout image in response to a scaling instruction from the user.

  Note that the layout generation unit 19 displays the characters displayed at a predetermined position on the display screen (for example, the top of the document, the center of the display screen, or a position specified by the user) before the scaling operation is started. The layout information is regenerated so that the row including the column is displayed at a preset position on the display screen (for example, the top of the document on the display screen or the center of the display screen) after the re-layout. Details of the re-layout method will be described later.

  The main control unit 23 controls the operation of each unit of the display control unit 15 and is, for example, a processing circuit realized by a microcomputer, a microprocessor, or the like that includes a CPU (Central Processing Unit). . The main control unit 23 extracts various installation values, data tables, programs for performing various controls, and the like stored in a storage unit (not shown), performs arithmetic processing and determination processing, and based on these processing results A control signal is sent to each part of the display control unit 15 to control the operation of each part. As the storage unit, various conventionally known storage means such as a read only memory (ROM), a random access memory (RAM), a hard disk drive (HDD), and the like can be used. Note that other blocks included in the display control unit 15, that is, the document information reading unit 18, the layout generation unit 19, the display image generation unit 20, the scaling factor calculation unit 21, and the character size calculation unit 22 are also the same as the main control unit 23. Similarly, a processing circuit realized by a microcomputer having a CPU, a microprocessor, or the like may be used.

  The display unit 14 is a display unit that displays an image corresponding to the display image data output from the display processing unit 13. As the display unit 14, for example, a liquid crystal display, an organic EL display, a plasma display, a CRT, or the like can be used. In this embodiment, a case where a liquid crystal display having a multi-touch screen function is used will be described.

  Next, the flow of processing when a scaling operation is performed on the display device 1 will be described with reference to FIGS. 1, 3, and 4. FIG. 3 is a flowchart showing the flow of processing when a scaling operation is performed, and FIG. 1 is an explanatory diagram showing an example of a display screen when a pinch-out operation (scaling operation) is performed. 4 is an explanatory diagram illustrating an example of a display screen when a pinch-in operation (magnification operation) is performed.

  As shown in FIG. 3, first, the main control unit 23 controls the document information reading unit 18 to read document data in accordance with an instruction from the user from the document information storage unit 11 and transmits the document data to the layout generation unit 19. (S1). The document information reading unit 18 may appropriately read document data from the document information storage unit 11 in accordance with the processing speed of the layout generation unit 19, and the document data read by the document information reading unit 18 may be buffered (not shown). May be output to the layout generation unit 19 via

  Next, the main control unit 23 controls the layout generation unit 19 and the document data input from the document information reading unit 18 and preset display conditions (conditions such as character size, number of columns, and display screen size). Based on the above, layout information indicating a layout for displaying an image corresponding to the document data on the display unit 14 is generated, and the generated layout information is stored in the layout storage unit 16 (S2).

  Next, the main control unit 23 controls the display image generation unit 20 to cause the display unit 14 to display an image corresponding to the document data based on the layout information and the browsing position information stored in the layout storage unit 16. Display image data is generated and output to the display unit 14 for display (S3). The browsing position information is information indicating a page to be displayed in the document data, a display start position in the page, and the like. The browsing position information may be designated by the user each time, and when the document data has been browsed before, the location where the previous browsing is finished is stored and the location is set as the browsing location information. It may be. Further, when there is no instruction for specifying the browsing start position from the user or when there is no past browsing history, it may be displayed from the top position of the top page of the document data.

  Thereafter, the main control unit 23 determines whether a display transition operation is input from the user (S4). Here, the display transition operation is a page change operation for changing the page to be displayed (for example, a page turning operation for moving to the next page, a page specifying operation for moving to the specified page, etc.), or a display target in the page For example, the operation of moving a part (for example, line feed operation, scroll operation, etc.).

  If it is determined in S4 that a display transition operation has been input from the user, the main control unit 23 returns to the process of S3 to control the display image generation unit 20 and the layout information stored in the layout storage unit 16 and Display image data to be displayed on the display unit 14 is generated based on the browsing position information corresponding to the display transition operation, and is output and displayed on the display unit 14.

  On the other hand, when determining in S4 that the display transition operation from the user has not been input, the main control unit 23 determines whether or not a scaling operation (magnification adjustment operation) has been performed by the user (S5). When determining that the scaling operation has not been performed, the main control unit 23 proceeds to the process of S12 described later.

  On the other hand, when determining that the scaling operation has been performed, the main control unit 23 controls the scaling factor calculation unit 21 to change the scaling factor (enlargement ratio or reduction ratio) according to the user's operation and display start coordinates of the preview image. And the calculated scaling factor and display start coordinates are stored in the scaling factor storage unit 17 (S6). Further, the main control unit 23 controls the display image generation unit 20 to generate a preview image based on the scaling factor and display start coordinates calculated by the scaling factor calculation unit 21, and the generated preview image is displayed on the display unit 14. Output and display (S7).

  Specifically, the scaling factor calculation unit 21 continuously calculates the scaling factor based on the amount of movement of the user's finger in the pinch-in operation or the pinch-out operation during the period during which the scaling factor adjustment operation is performed (or every predetermined time). (For example, every 0.1 seconds)), and the scaling factor stored in the scaling factor storage unit 17 is sequentially updated. Note that when the magnification adjustment operation is performed by an operation method other than the pinch-in operation or the pinch-out operation, the magnification may be calculated by a calculation method according to the operation method.

  Further, as shown in FIGS. 1 and 4, the scaling factor calculation unit 21 displays the upper left corner (displayed document) of the display image displayed immediately before the scaling operation (magnification adjustment operation) is started. The display position of the preview image is set so that the first character string in () is placed at the upper left corner of the preview image (first character string in the preview image), and the display start coordinates are calculated. In the example shown in FIGS. 1 and 4, the preview image is displayed on the entire display screen. However, the present invention is not limited to this, and the preview image may be displayed on a part of the display screen. Further, the shape of the preview image display area is not limited to a rectangle, and may be, for example, a circle or an ellipse.

  Thereafter, the main control unit 23 determines whether or not the user has performed a scaling factor determination operation (S8). In the present embodiment, after performing a pinch-in operation or a pinch-out operation, it is determined that a scaling factor determination operation has been performed when the user's two fingers are separated from the display screen. However, the present invention is not limited to this, and the scaling factor determination operation may be performed by the user operating a predetermined button or the like.

  If it is determined in S8 that the scaling factor determination operation has not been performed, the main control unit 23 returns to the process in S6 and continues generating and displaying the preview image.

  On the other hand, if it is determined in S8 that the scaling factor determination operation has been performed, the main control unit 23 controls the character size calculation unit 22, and the scaling factor and scaling operation stored in the scaling factor storage unit 17 at that time. The character size after scaling (after layout change) is calculated according to the character size before the image is performed (S9).

  Further, the main control unit 23 controls the layout generation unit 19, the character size after scaling calculated by the character size calculation unit 22, and preset display conditions (conditions such as the number of stages and the size of the display screen) ) And the layout information stored in the layout storage unit 16 is updated to the regenerated layout information (S10).

  In addition, the main control unit 23 controls the display image generation unit 20 to regenerate the layout information stored in the layout storage unit 16 and a predetermined display condition (preset display condition after layout update). Based on the above, display image data to be displayed on the display unit 14 is generated, and is output and displayed on the display unit 14 (S11).

  Specifically, in the present embodiment, as shown in FIGS. 1 and 4, the character string arranged at the top of the display screen before the layout update in the regenerated layout (example in FIGS. 1 and 4). In this case, the display condition after the layout update is set so that the line including “On”) is arranged in the first line of the display screen after the layout update.

  Thereafter, the main control unit 23 determines whether or not a display end operation has been input by the user (S12). If it is determined that a display end operation has not been input, the process returns to S4. On the other hand, if it is determined that a display end operation has been input, the process ends.

  As described above, in the display device 1 according to the present embodiment, when the scaling operation is performed, the character size calculation unit 22 displays the character size displayed on the display screen before the scaling operation is input. And the scaling factor designated by the scaling operation, the character size after scaling is calculated, and the layout generation unit 19 obtains the layout information according to the character size after scaling calculated by the character size calculation unit 22. The character string that was regenerated and displayed in the upper left corner (start position) of the display screen before the scaling operation was performed among the lines of the layout information regenerated by the layout generation unit 19 The display image data is regenerated based on the regenerated layout information so that the line including “” is displayed in the first line on the display screen.

  As a result, when displaying a re-layout image according to the scaling operation, the character string displayed at the top position of the document on the display screen before the scaling operation is performed is changed to the top of the display screen after scaling. Can be displayed in a row. Therefore, the user can easily recognize the display position after re-layout of the character string referred to by the user before the re-layout.

  In the present embodiment, when displaying a preview image during a period during which the magnification adjustment operation is performed, the preview image is arranged so that the upper left of the display image before the scaling operation is started is arranged at the upper left of the preview image display screen. However, the display start position is not limited to this. For example, when the document data is displayed in the vertical writing display, the upper right corner (the top position of the document) of the display image displayed immediately before the scaling operation is started is the upper right corner (the top of the document) of the preview image. The display position of the preview image may be set so as to be arranged at (position).

  Further, the display position of the preview image may be set based on the position according to the user's instruction. For example, as shown in FIGS. 5 to 8, a position between two fingers in a pinch-out operation (or pinch-in operation) (for example, the midpoint of the contact position of two fingers) is arranged at the center of the preview image. A preview image may be generated as described above. In addition, the preview image is arranged so that the image corresponding to the position between the two fingers in the pinch-out operation (or pinch-in operation) is also arranged in the same position as before the start of the pinch-out operation (or pinch-in operation) in the preview image. May be generated.

  Further, in the present embodiment, the layout is updated so that the line including the character string arranged at the top of the display screen before the layout update is arranged in the first line of the display screen after the layout update. The display conditions after updating are set. However, the display condition after the layout update is not limited to this.

  For example, as shown in FIG. 5, even if the display condition after the layout update is set so that the line including the character string arranged at the top of the preview image is arranged at the top line of the display screen after the layout update. Good.

  Further, as shown in FIG. 6, the line including the character string arranged at the head of the preview image is displayed at the center line of the display screen after the layout update (in the approximate center in the direction perpendicular to the document stretching direction on the display screen). The display condition after the layout update may be set so as to be arranged in the arranged row).

  Further, as shown in FIG. 7, the display condition after the layout update so that the line including the character string arranged at the center (or near the center) of the preview image is arranged at the top line of the display screen after the layout update. May be set.

  Further, as shown in FIG. 8, the display conditions after the layout update so that the line including the character string arranged at the center (or near the center) of the preview image is arranged in the center line of the display screen after the layout update. May be set.

  In the present embodiment, the display control unit 15 provided in the display device 1 (or a part of each unit provided in the display control unit 14) may be realized by software using a processor such as a CPU. That is, the display device 1 stores a CPU (central processing unit) that executes instructions of a control program that realizes the function of the display control unit 15 (or a part of each unit included in the display control unit 14), and the program. It may be configured to include a read only memory (ROM), a random access memory (RAM) for expanding the program, a storage device (recording medium) such as a memory for storing the program and various data, and the like. In this case, an object of the present invention is to provide a program code (execution format program, intermediate) of the control program of the display control unit 15 (or a part of each unit provided in the display control unit 14) which is software for realizing the above-described functions. This is achieved by supplying a recording medium in which a computer program (code program, source program) is recorded so as to be readable by a computer to the display device 1, and the computer (or CPU or MPU) reading and executing the program code recorded on the recording medium. Is done.

  Examples of the recording medium include a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, and an optical disk such as a CD-ROM / MO / MD / DVD / CD-R. Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM / flash ROM.

  The display device 1 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Further, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  In addition, the display control unit 15 provided in the display device 1 is not limited to being realized using software, and may be configured by hardware logic. It may be a combination of arithmetic means for executing software that performs hardware control and residual processing.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

  The present invention can be applied to a display device that displays a document image corresponding to document data.

DESCRIPTION OF SYMBOLS 1 Display apparatus 11 Document information storage part 12 Operation input part 13 Display processing part 14 Display part 15 Display control part 16 Layout storage part 17 Variable magnification memory | storage part 18 Document information reading part 19 Layout production | generation part 20 Display image generation part 21 Variable magnification calculation Part 22 character size calculation part 23 main control part

Claims (10)

A display device that displays an image according to document data on a display screen,
A display control unit for displaying an image corresponding to the document data on the display screen in accordance with a preset display condition;
A scaling factor adjustment operation by the user for adjusting a scaling factor when the character size of each character in the image corresponding to the document data displayed on the display screen is scaled and displayed, and the scaling factor adjustment operation An operation input unit that accepts a scaling factor determination operation by a user for determining a scaling factor performed following
The display control unit
A preview image obtained by scaling the image corresponding to the document data displayed on the display screen according to the magnification adjustment operation without changing the layout of the image when the magnification adjustment operation is performed. Is displayed on the above display screen,
When the scaling factor determination operation is performed, the character size of the image corresponding to the document data displayed on the display screen before the scaling factor adjustment operation is started and specified by the scaling factor determination operation The character size after scaling is calculated based on the scaled magnification, and the display screen is displayed before the scaling ratio adjustment operation is performed in each line after scaling according to the calculated text size after scaling. reproducing the row containing the text that was displayed in a predetermined position of the image corresponding to the document data to change the layout of the image corresponding to the document data to be displayed at a predetermined position in the display screen display apparatus characterized by displaying perform formation.   The display control unit displays, on the display screen, a line including the character string displayed at the top position of the document on the display screen before the scaling factor adjustment operation is performed among the lines of the regenerated image. The display device according to claim 1, wherein the display device is displayed on a first line or a center line.   2. The display control unit according to claim 1, wherein the character string displayed at a predetermined position on the display screen is displayed at a preset position in the preview image before the magnification adjustment operation is performed. The display device described in 1.   The display control unit displays the character string displayed at the start position of the document displayed on the display screen before the scaling factor adjustment operation is performed, or the start position of the document in the preview image or the preview image. The display device according to claim 3, wherein the display device is displayed in the center of the display. The display control unit
When the document data is displayed in horizontal writing, the character string displayed in the upper left corner of the document displayed on the display screen before the magnification adjustment operation is performed is the document in the preview image. In the upper left corner of
When the document data is displayed in vertical writing, the character string displayed in the upper right corner of the document displayed on the display screen before the scaling adjustment operation is performed is displayed in the preview image. The display device according to claim 3, wherein the display device is displayed in an upper right corner of the document.   The display control unit displays a character string displayed at a position corresponding to an instruction input from a user among documents displayed on the display screen before the scaling factor adjustment operation is performed. The display device according to claim 3, wherein the display device is displayed at a head position or a center of the preview image. The operation input unit may be a pinch-in operation that reduces the interval between the two fingers while the user touches the display screen with two fingers, or the two that the user touches the display screen with two fingers. By detecting a pinch-out operation that increases the interval between fingers, the above variable magnification adjustment operation is accepted.
The display control unit displays the character string displayed at a position between the two fingers touching the display screen among the documents displayed on the display screen before the scaling factor adjustment operation is performed. The display device according to claim 6, wherein the display is displayed at a head position of the document in the preview image or at a center of the preview image. The display control unit
When the regenerated image is displayed on the display screen, the character string displayed at the top position of the document in the preview image or the line including the character string displayed in the center of the preview image is displayed on the display screen. The display device according to any one of claims 3 to 7, wherein the display device is displayed on a first line or a center line of lines displayed on the screen. A display method for displaying an image according to document data on a display screen,
A display step of displaying an image corresponding to the document data on the display screen in accordance with a preset display condition;
A scaling factor adjustment operation by the user for adjusting a scaling factor when the character size of each character in the image corresponding to the document data displayed on the display screen is scaled and displayed, and the scaling factor adjustment operation An operation input step for accepting a scaling factor determining operation by the user for determining a scaling factor performed following
A preview image obtained by scaling the image corresponding to the document data displayed on the display screen according to the magnification adjustment operation without changing the layout of the image when the magnification adjustment operation is performed. Displaying on the display screen,
When the scaling factor determination operation is performed, the character size of the image corresponding to the document data displayed on the display screen before the scaling factor adjustment operation is input, and designated by the scaling factor determination operation A character size calculating step of calculating a character size after scaling based on the scaled magnification,
When the scaling factor determination operation is performed, the display screen is displayed before the scaling factor adjustment operation is performed on each line after scaling according to the scaled character size calculated in the character size calculation step. reproducing the row containing the text that was displayed in a predetermined position of the image corresponding to the document data to change the layout of the image corresponding to the document data to be displayed at a predetermined position in the display screen A display method comprising: a re-displaying step of performing and displaying.   The program for functioning a computer as said display control part with which the display apparatus of any one of Claim 1 to 8 is provided.

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